Automatic oil cup for air pumps



A. LAUTZ.

AUTOMATIC OIL CUP FOR AIR PUMPS.

APPLICATlON FILED FEB.16,1921.

Patented Jan. 10, 1922'.

INV

ADAM LAUTZ, F EAST- ST. LOUIS, ILLINOIS.

AUTOMATIC OIL CUP FOR AIR PUMPS.

Lacasse.

Specification of Letters Patent.

Patented Jan; 10, 1922.

Application led February 16, 1921. Serial No. 445,304.

To all whom it-may concern:

Be it known that I, ADAM Laura, a citizen of the United States, and resident of East- St. Louis, Illinois, have invented certain new and useful Improvements in an Automatic Oil Cup for Air Pumps, ofwhich the following is a specification. n I

This invention relates to improvements in an automatic oil cup for air pumps, and has for its object a suitable casing in which is provided an oil receptacle and a vertical oil passage through which the oil is raised by means ofair pressure in the top of the receptacle and from this passage the oil is fed in a small quantity through a downward port and communicating with a ball valve which likewise operates under air pressure, and by this manipulation a small quantity of oil is fed from the oil receptacle down through a port in the base of the casing and enters into the cylinder of the air pump.

The operation is controlled` by the reciprocatory action of the piston in the cylinder of the air pump, that is by the movement of the piston while compressing the air therein has a tendency to close the ball valve yet permitting a small supply of air to pass into thefreceptacle and during the back stroke of the piston the ball is released and a small particle of the oil is permitted to pass through the port and flow into the cylinder. f

Figure 1, is a vertical sectional view of my complete invention.

Fig. 2, is a top plan view of the same.

Fig. 3, is a horizontal sectional view taken on the line 3-3 of Fig. 1.

F ig, 4, is a sectional view taken on the line 4--4 of Fig. 1. 3

Fig. 5, is a sectional View taken on the line 5'-5 of Fig. 1. j

Fig. V(i, is a sectional view line 6-6 of Fig. l.

In the general construction of my invention I provide a suitable casing 7 in which is located an oil receptacle 8, thevbase `9 of the casing terminates into a screw-threaded projection 10 by which the casing is attached to the cylinder of the pump.

taken on the From the base portion of the casing and extending upwardly through the receptacle 1s a hollow arm 11 which extends` into a dome 12 formed in the top of the casing, the

upper end of said arm is located a short distance from theK top Y,of the dome and ,in

`said arm is a small outlet or port 13 which extends into the interior or large vertical port 14 formed in the arm, and extending through the base. In the top of the arm and at a suitable distance beneath the port 13 is placed a cross pin 15 which supports a ball valve 16, the tendency of which is to close the port 13 when air pressure is directed into the port 14. l

Toone side of the casing is formed aprojection 17, and in the same is formed a vertical port 18 which communicates at its bottom with the lower portion of the receptacle r8, the upper end of the port 18 terminates into a vhorizontal port 19, this port communicates with a vertical bore or passage 20 which extends through the entire projection 17 and in the upper poi-tion of the bore is inserted a stem 21, the top being provided with a head 22 terminatinglintoy screw threaded vportion 23 by which the stem is held in position in the top of the bore.: In this stem is `provided a .vertical port 24 and this port has communication with the horizontal port 19 by lmeans of radial `ports 25 formed in the stem.

The bottom of the stem has a portion of itself reduced in diameter as that indicated by the numeral 26, the bottom edge being slightly counter-sunk so as to act as a seat for the ball 27, and in the reduced portion above the counter-sunk seat are radial ports 28 which communicate with 4the vertical port 24, j.

In the bottom of the vertical bore 2O is inserted an adjusting stem 29, its upper portion is provided with screw-threads 30 which operate in screw threads 31 formed in the lower portion of the bore y20, a portion `of this adjusting stem is provided with a vertical port 32 and terminates into radial ports 33, a portion of this adjusting stem is reduced in diameter as that shown at'34.

In the base of the casing and in alignment `with the radial ports 33 of thestem 29 is.

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a horizontal port or oil passage 35, this passage communicates with the vertical passage 14: through which a small' portion of oil after having passed through the bore 20 and its ports Hows into the cylinder of the air pump.

Leakage around the adjusting stem 29 is prevented by means of the packing nut 3 6. f On the upper portion and to one side of the casing is provided an extension 37 in which a plug 38 is inserted and through this projection when .the plug is removed` oil may be inserted into the receptacle and acts as a filling medium. This plug is provided with an air escape vent 39 which permits the air to gradually vescape when unloosening the plugso as to prevent theV oil from being forced out through the opening under the air pressure which is in the'upper portion ofthe ,receptacle and above the oil line. It likewise acts as anindicator to test the working of the cup while the pump is in action. YThev top of the casing as well as the plug are provided with heads 10 to which a chain 41 or like device is attached so as to prevent the plug when'rremoved from its position from becoming lost or mis-placed. Y

The operation of my invention `is a follows: I

When the devicehas been placed in position on the cylinder of an air pump and the receptacle filled with oil, thevadjustingstem 29 is then manipulated to properly adjust the movement of the ball valvec'arried thereby, when the same has been properly adjusted'its actionis as follows: j

^ By the reeiprocatory movement of the vpist'nrin the air `,pump the air pressure will enter into the port 14, a portion of the air passing upwardraising the ball 16 in the top of the arm, closing the' port 13, some of the Vair also passes through the horizontal port 3.5,v and through the radial ports 33 communicatingwith the'ball 27, forcing it upward into the valve seat`v formed inthe Vbottjorn'of the reduced vportion'26 of the stem 2 1, this closes'ol' thedirect communication of the air with the vertical port v24C formed inthe vstein 21, but on account of the reduced portion' permits a small amount `of air to pass around and enter into the radial ports 28. This' air passes upwardly and through the Port 2e and ist@ the' herizental Port 19 and then percolating downwardly through i' the oill'in'the vertical port 18 andthen permits the .Same t0 pesaupvafdly through the body of oil in the receptacle andlodge in the dome. The airpressure in the domeafter the Continuous Operation @if the pump as SHID'BS a 'pressure of approximately einen poundsj During the reverse actionof the piston the of oil and-has 'a tendency yto 'force the oil from the' receptacle up through the port 18 through the radial ports 25 down through the port 2% and lodge around the ball 27, this oil is prevented from escaping` on account of the ball closing theport 32 located in the adjusting stem 29. v

lVhen the pump piston is working in compression action andthe ball 27 again raised, this particle of oil above and around the ball will-pass. around and enter into the port 32. -then during-the reverse action of the piston,

this oilis drawn from the port 32 through the radial ports 33 into the ports 35 and 14 to the cylinder. 'Th'ev'ball 16 in the top of the arm has a tendency to check the passage of air from the port to the dome, but to relieve some ofthe'pressure from the domeY during the reverse movement of the piston. By this vconstruction of oil cup the oil is fed from the cup firstv upwardly then downwardly Vthrough Ythe several passages and permitted to enter the cylinder drop by drop, or in such small portion as may be required for proper lubrication and the quantity of oil is governed by the adjustment of the adjusting stem 29.

The circulation of air in thecup has a ytendency to heat or warm` the' oilv in the receptacle.

vl/Vhen it becomes necessary vtoiillthe cup.

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passage communicating the bore with the port vformed in the casing through which oil in small quantity may be passed from the receptacle into thev cylinder of the pump,

Isubstantially as specified. l j

2. A device of the character described.

comprising a cup having an oil receptacle, aV port formed in one side thereof, through which oil from the cupis passed upwardly, a bore formed in the projection, said bore Vbeing in `commun'ication with the' vertical port, a stem inserted in the bore and provided with an oil passage, an adjusting stem located in the lower portion of the bore, a ball valve carried bythe adjusting stem hollow projection, substantially'as speeified. 3- en, automa-t1@ 0.11 .ein eemnliseeasing having an oil receptacle, an oil passage 'for regulating the passage ofthe oil, a holj 'low projection projecting from the base to approximately the top of the oil receptacle 'and a ball valve located in the topi of` the l0 and a means for regulating the quantity of the oil to be delivered to the stantially as specified.

In testimony whereof, I have signed my name to this speoication, in presence of two subscribing Witnesses.

cylinder7 sub- ADAM LAUTZ.

Witnesses:

MICHAEL SCHMITT, ALFRED A. EIoKs. 

